Time-advanced actuating device for weaving loom stop-motions



Dec. 22, 1953 J. PICANOL 2,663,329

TIME-ADVANCED ACTUATING DEVICE FOR WEAVING LOOM STOP-MOTIONS Filed Sept. 27, 1951 3 Sheets-Sheet 1 //Wf/W0/? Jamze ca zol Dec. 22, 1953 J. PICANOL 2,663,329

TIME-ADVANCED ACTUATING DEVICE FOR WEAVING LOOM STOP-MOTIONS Filed Sept. 27, 1951 3 Sheets-Sheet 2 Jaime Pica/20! Dec. 22, 1953 J HCANQL 2,663,329

TIME-ADVANCED ACTUATING DEVICE FOR WEAVING LOOM STOP-MOTIONS Filed Sept. 27, 1951 3 Sheets-Sheet 3 Jaime Rica/mi Patented Dec. 22, 1953 TIME-ADVANCED ACTUATING DEVICE- FOR WEAVING LOOM STOP-"MOTIONS erg, Zillebeke-lez-Ypres, Belgium Application September 27, I951, Serial No} 248,614

JaimePicanol, Zandb Claims.

The invention relates to weaving looms with a fast-reed in which the stepping of the loom, when the shuttle does not arrive in the shuttlebox at the proper time, is effected by means of the buffers placed onboth sides of the loom.

The aim of the invention is to reduce the shock produced by the stopping of the: loom batten through the buiiers. This result is, according to the invention, obtained by time advancing the actuation of the stop-motion device. In the conventional looms, the time elapsing between the moment when the noses of the stop rods abut the stops on the buiiers and the moment of the release of the operating lever for the stop-motion or clutch mechanism of the driving motor, is such that the resulting shock is relatively great because the driving couple subsists until said clutch or stop-motion is actuated. Such shocks have, of course, an adverse effect on the loom.

According to'the invention, the actuation of the stop-motion mechanism is time advanced or, comparatively to the conventional looms, anticipated in such a manner that the declutching of the motor is made independent of the'mom'ent of release of said operating lever, or, in other words, independent of the time elapsing between the contact of the stop-rod noses with the stops ofthe buffers, and the release of the operating lever of the stop-motion mechanism.

According to the invention, this time-advanced or anticipated actuation. of the stop-motion mechanism is produced by the fact that the buffer or an element in contact with or mechanically linked to the buffer, actuates, right at the start of the backward movement of said buffer, a hitch anism capable of operating the stop-motion device before the actual stopping of the loom.

The special mechanism interposed between the clutch and the buffer or any organ displaceable therewith is essentially variable and will be adapted, for instance; tothe kind of clutch used.

As an example, and without any restrictive orlimitative character, an. embodiment of" such a mechanism, capable to time-advance the declutching of the drivingmotor is described hereafter as applied to a clutch which is described more fully in my co-pending patent application of even date, Ser. No. 248,608. Reference is made to the accompanying drawings in which:

Figure l is a schematic side elevation of the device according to the invention;

Figure 2 is a plan view of the device according to the invention shown at rest;

The loom must be stopped instantaneously whenever the shuttle does not reach the shuttlebox at the proper time. To achieve this result, the loom comprises a stop-rod 2 secured to the batten I and provided with noses 3, which are duly controlled by the position of the shuttle and capable of contacting the stops 4- on the lenders 5. Inthe conventional looms, said buiiers- 5, by moving back under the action of the stop-rod noses 3,. cause the operating lever of the clutch to declutch the latter.

To effect the time-advanced stop motion, the buffer 5 according to the invention, is provided, for example, with a lateral ear 6 in the opening of which is engaged one of the ends of a rod 1 the other end of which ispivoted at the free end of a small lever 8. This latter is pivoted on a pin 9 mounted near one of the extremities of a rocker beam H! which may oscillate about its pivot H. The other end of said rocker beam It is connected by a rod I2 to one of the ends of a second rocker beam I3 capable of oscillating about the pivot M; the other end of said rocker beam I3 is pivoted at I5 on the rotatable and axially displaceable shaft 24 mounting the disc 25' of the clutch Hi. The disc 25 is adapted to come into engagement with the cooperating disc 26. This clutch l-t is described more fully inthe above mentioned co-pending patent application of even date Ser, No. 248,608.

The pivot I4- is mounted at the extremity of a connecting rod II the other extremity of which is pivoted on a pin l8 which is mounted on the housing of the clutch IE or on another stationary part of the m. The rocker'beam I0 is perma nen-tly' urged towards its rest position by a return spring 19 which causes a slide Zilto move along a fi'x'ed guide 21' on which are screwed the nuts 22, 23 forming an adjustable abutment for said returnspring 19.

When the 100m operates normally, and when the buffers 5 are in their initial rest position, the various elements of the mechanism, according to theinventiong are" at rest and have no action on the clutch. On the contrary, the moment the stop-rodnoses 3 abut the stops 4 of the buffers 5 and initiate the backward movement of the latter, the rod 1 is moved longitudinally and causes the rotation of the lever 8 about its pin 9. However, said lever 8 is disposed so as to contact at its free end a frame part 24 of the loom. Therefore, the rotation of said lever 8 causes the rotation of the rocker beam 10 about its pivot II and against the action of the spring I9. Said rocker beam I0 exerts a pull on the second rocker beam l3 through the intermediary of the rod [2. The rocirer beam i 3 actuates the stop-motion mechanism at once by causing the separation between the driving and the driven discs.

From the foregoing it is apparent that the mechanism which has just been described is actuated as soon as the buffers begin their recoil movement, that is an instant after the stop-rod noses have made contact with the stops 4 of the buffer 5. lhe declutching of the discs 25 and 25 is thus anticipated with regard to the stopping or" the loom. and it is time-advanced with regard to the normal declutching operation through the action of the operating hand lever (not represented) which is found in the known weaving looms. It is evident that the mechanical linkages between the buffer and the clutch mechanism may be modified in. various manners, without departing from the spirit and scope of the appended claims, provided they operate to actuate the stopmotion mechanism upon the backward movement of the buiiers before the loom is actually stopped and independently of the release of the manually operated declutching lever.

Iclaim:

1. In a weaving loom having a driving motor, a clutch mechanism associated with said motor, a batten and a buffer displaceable under the action of said batten, means for causing said clutch mechanism to take a declutched position, operable by said buiier upon an initial small displacement of the latter, comprising mechanical linkages connecting said buiier to said clutch mechanism whereby said motor will be declutched before said loom has actually stopped, said mechanical linkages including a rocker beam pivoted on the loom frame, a rod pivoted directly to the buffer at one end, a lever pivoted to one arm of said rocker beam, said rod pivoted at its other end to the free end or said lever, and a stationary member mounted on the loom and abutting the free end of said lever.

2. In a weaving loom having a driving motor, a clutch mechanism associated with said motor, a batten and a buffer displaceable under the action of said batten, means for causing said clutch mechanism to take a declutohed position, operable by said builer upon an initial small displacement of the same, comprising mechanical linkages connecting the buffer to said clutch mechanism whereby said motor will be declutched before said loom has actually stopped, said mechanical linkages comprising a rocker beam pivoted on the loom frame, a rod pivoted directly to the buffer at one end, a lever pivoted to one arm of said rocker beam, said rod pivoted at its other end to the free end of said lever, a stationary member mounted on the loom and abutting the free end of said lever, a second rocker beam having one arm connected to said clutch mechanism and the other arm connected to the other arm or said first mentioned rocker beam.

3. In a weaving loom having a driving motor, a clutch mechanism associated with said motor, a batten and a buffer displaceable under the action of said batten, means for causing said clutch mechanism to take a declutched position operable by said buffer upon initial small displacement of the latter, comprising mechanical linkages connecting said bufier to said clutch mechanism whereby said motor will be declutched before said loom has actually stopped, said mechanical linkages comprising a rocker beam pivoted on the loom frame, a rod pivoted directly to the buffer at one end, a lever pivoted to one arm of said rocker beam, said rod pivoted at its other end to the free end of said lever, a stationary member mounted on the loom and abutting the free end of said lover, a second rocker beam having an arm connected to said clutch mechanism and the other arm connected to the other arm of said first mentioned rocker beam, a return spring urging said first roe er beam to a position corre sponding to the clutching position of said clutch mechanism and means to adjust the tension of said spring, the latter being applied to said first mentioned arm of said first rocker beam at a point lying outwardly of the pivot connection of the said lever with said same arm.

4. In a weaving loom having a driving a clutch mechanism associated with motor, a batten and a buffer displaceable under action of said batten, means for causing clutch mechanism to take a declutched posi operable by buffer upon an initial s: all displacement of the latter, comprising m chanical linkages connecting said buffer to said clutch mechanism whereby the motor will be declutched before said loom has actually stopped, said mechanical linkages comprising a rocker beam piv oted on the frame, a rod pivoted directly to the buffer at one end, a first lever pivoted to one arm of said rocker beam, said rod pivoted its other to the free end of lever, a stationary member mounted on the loom abutting the free end of said first lover, a second rocker beam having one arm connected t said clutch mechanism and the other arm connected to the other arm of said first rocker beam, re" turn spring urging said first rocker to a position corresponding to the clutching position of said clutch mechanism, means to adjust the tension of said spring, a second stationar element mounted on the loom, a second lever pivot ally connected to the pivot of said second rocker beam at one end and pivoted on said second sta tionary element at the other end.

5. In a weaving loom as claimed in claim 4, wherein said spring is attached to said first mentioned arm of said first rocker beam at a point lying outwardly of the pivot connection of said first lever with said same arm.

JAIME PICANOL.

References Cited in the file of this patent UNITEDVSTATES PATENTS Number Name Date 1,342,555 Lussicr June 8, 1920 1,620,194 Davis I- Mar. 8, 1927 1,742,882 Stone Jan. '7, 1930 2,082,321 Bird et a1. June 1, 1987 2,551,492 l-iindle May 1, 1951 

